Four-Photon Process Induced Upconversion Lasing
FAN Hai-Hua1 , WANG He-Zhou1 , TIAN Yu-Peng2
1 State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275
2 Department of Chemistry, Anhui University, Hefei 230039
Four-Photon Process Induced Upconversion Lasing
FAN Hai-Hua1 ;WANG He-Zhou1 ;TIAN Yu-Peng2
1 State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275
2 Department of Chemistry, Anhui University, Hefei 230039
关键词 ：
42.65.Ky
Abstract ： It is measured that upconversion fluorescent intensity of a new molecule is proportional to the quartic of excitation density. This demonstrates that it is a four-photon absorption process. Furthermore, at high-density ultrashort pulse laser pumping, an emission appears to satisfy four criteria of lasing, including the highly directional emission, the short emission duration, the spectral narrowing, and changing to linear output/input relationship above a threshold. The experimental results demonstrate that the four-photon-process-induced amplified spontaneous emission occurs.
Key words ：
42.65.Ky
出版日期: 2005-05-01
:
42.65.Ky
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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2005, Vol. 22 
